Dutiyasekhasutta
“Pañcime, bhikkhave, dhammā sekhassa bhikkhuno parihānāya saṁvattanti. Katame pañca? Idha, bhikkhave, sekho bhikkhu bahukicco hoti bahukaraṇīyo viyatto kiṅkaraṇīyesu; riñcati paṭisallānaṁ, nānuyuñjati ajjhattaṁ cetosamathaṁ. Ayaṁ, bhikkhave, paṭhamo dhammo sekhassa bhikkhuno parihānāya saṁvattati.
A Trainee (2nd)
“These five things lead to the decline of a mendicant trainee. What five? Firstly, a mendicant trainee has many duties and responsibilities, and is competent in many tasks. They neglect retreat, and are not committed to internal serenity of heart. This is the first thing that leads to the decline of a mendicant trainee.